1 files changed, 63 insertions, 0 deletions
diff --git a/libartbase/base/os.h b/libartbase/base/os.h
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+++ b/libartbase/base/os.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_LIBARTBASE_BASE_OS_H_
+#define ART_LIBARTBASE_BASE_OS_H_
+
+#include <stdint.h>
+
+namespace unix_file {
+class FdFile;
+}  // namespace unix_file
+
+namespace art {
+
+typedef ::unix_file::FdFile File;
+
+// Interface to the underlying OS platform.
+
+class OS {
+ public:
+  // Open an existing file with read only access.
+  static File* OpenFileForReading(const char* name);
+
+  // Open an existing file with read/write access.
+  static File* OpenFileReadWrite(const char* name);
+
+  // Create an empty file with read/write access. This is a *new* file, that is, if the file
+  // already exists, it is *not* overwritten, but unlinked, and a new inode will be used.
+  static File* CreateEmptyFile(const char* name);
+
+  // Create an empty file with write access. This is a *new* file, that is, if the file
+  // already exists, it is *not* overwritten, but unlinked, and a new inode will be used.
+  static File* CreateEmptyFileWriteOnly(const char* name);
+
+  // Open a file with the specified open(2) flags.
+  static File* OpenFileWithFlags(const char* name, int flags, bool auto_flush = true);
+
+  // Check if a file exists.
+  static bool FileExists(const char* name, bool check_file_type = true);
+
+  // Check if a directory exists.
+  static bool DirectoryExists(const char* name);
+
+  // Get the size of a file (or -1 if it does not exist).
+  static int64_t GetFileSizeBytes(const char* name);
+};
+
+}  // namespace art
+
+#endif  // ART_LIBARTBASE_BASE_OS_H_